Java多线程

class MyThread extends Thread {
    public void run() {
        // 线程执行的逻辑
    }
}
public class Main {
    public static void main(String[] args) {
        MyThread thread = new MyThread();
        thread.start(); // 启动线程
    }
}

class MyRunnable implements Runnable {
    public void run() {
        // 线程执行的逻辑
    }
}
public class Main {
    public static void main(String[] args) {
        MyRunnable runnable = new MyRunnable();
        Thread thread = new Thread(runnable);
        thread.start(); // 启动线程
    }
}

class MyCallable implements Callable<Integer> {
    @Override
    public Integer call() throws Exception {
        // 在这里编写你的逻辑代码
        // 返回你的结果
        return 42;
    }
}
public class Main {
    public static void main(String[] args) throws Exception {
        // 创建一个线程池
        ExecutorService executorService = Executors.newSingleThreadExecutor();
        // 创建一个Callable任务
        Callable<Integer> callable = new MyCallable();
        // 提交任务并获得一个Future对象
        Future<Integer> future = executorService.submit(callable);
        // 等待任务执行完成并获取结果
        Integer result = future.get();
        // 输出结果
        System.out.println("Result: " + result);
        // 关闭线程池
        executorService.shutdown();
    }
}

//抽象角色(手机厂家)
public interface PhoneFactory {
    void deliverGoods();
}
//真实角色
public class Xiaomi implements PhoneFactory {
    @Override
    public void deliverGoods() {
        System.out.println("小米手机....发货了");
    }
}
//真实角色
public class Huawei implements PhoneFactory {
    @Override
    public void deliverGoods() {
        System.out.println("华为手机....发货了");
    }
}
//代理角色
public class JD implements PhoneFactory {
    private PhoneFactory factory;
    public JD(PhoneFactory factory) {
        this.factory = factory;
    }
    private void sailBefore() {
        System.out.println("售前服务");
    }
    private void sailAfter() {
        System.out.println("售后服务");
    }
    //对真实角色的行为(方法)进行增强
    @Override
    public void deliverGoods() {
        sailBefore();
        factory.deliverGoods();
        sailAfter();
    }
}
//调用者
public class ShoppingTest {
    public static void main(String[] args) {
        PhoneFactory haier = new Huawei();
        JD jd = new JD(haier);
        jd.deliverGoods();
    }
}
//拓展需求，购买OPPO手机
public class OPPO implements PhoneFactory{
    @Override
    public void deliverGoods() {
        System.out.println("OPPO手机....发货了");
    }
}
//调用者
public class ShoppingTest {
    public static void main(String[] args) {
        Factory oppo = new OPPO();
        JD jd = new JD(oppo);
        jd.deliverGoods();
    }
}